Which column do I not edit if I want the armor to appear but the no-armor appearance to stay the new one, but the rest of the appearances to be the default game models and textures?

Keep columns modela, texa and texaevil to keep the mod's underwear for Mara, edit from modelb to texj columns copying the values from other females rows, for example from a caucasian female (row 124, P_FEM_C_SML_02).